I would seriously look at an open source library to be honest, like Apache POI - Java API To Access Microsoft Format Files
Otherwise I guess you could have a look at [MS-XLS]: Excel Binary File...
Type: Posts; User: Json
I would seriously look at an open source library to be honest, like Apache POI - Java API To Access Microsoft Format Files
Otherwise I guess you could have a look at [MS-XLS]: Excel Binary File...